Thermodynamic studies of a HAT cycle and its components

The electric power grid contains more and more renewable power production such as wind and solar power. The use of renewable power sources increases the fluctuations in the power grid which increase the demand for highly efficient, fast-starting power-producing units that can cope with sudden production losses. One of the more innovative power plant cycles, that have the potential of competing with conventional combined power plants in efficiency but has a higher availability and faster start up time, is the Evaporative Gas Turbine (EvGT) or Humid Air Turbine (HAT). A thermodynamic evaluation of different HAT cycle layouts has been done in this paper. Each layout is evaluated separately which makes it possible to study different components individual contribution to the efficiency and specific power. The thermodynamic evaluation also shows that it is important to look at different cool-flow extracting positions. The effect of water temperature entering the cycle, called make-up water, and where it is introduced into the cycle has been evaluated. The make-up water temperature also affects the optimal pressure level for intercooling and it is shown that an optimal position can be decided considering design parameters of the compressor and the water circuit.     

融合运动信息和跟踪评价的高效卷积算子

针对基于方向梯度直方图与颜色命名的高效卷积算子(ECO-HC)算法缺少跟踪质量评价和滤波模板更新监督机制的问题,提出融合运动信息和跟踪评价的高效卷积算子. 将卡尔曼滤波器加入ECO-HC跟踪定位框架对目标执行联合跟踪,设计高置信度判别指标评价ECO-HC对每帧图像的跟踪效果,使用原始跟踪结果和卡尔曼滤波预测值的加权融合值,修正不满足判别指标的跟踪结果. 在滤波模板隔帧更新策略的基础上,加入当前帧跟踪结果质量评价信息,当2个条件同时满足时执行模板更新. 依托公开数据集OTB-2015评估算法性能,结果显示改进算法整体跟踪精确度、成功率和跟踪速率均优于原算法,在运动模糊、低分辨率、离开视野场景中的精确度分别提高3.0%、3.5%和2.8%,成功率分别提高3.8%、2.1%和4.0%. 改进算法在保证实时性的同时,有效提升了复杂场景下的跟踪效果.     

代谢指纹技术在曲药分析中的应用

在传统白酒酿造过程中，曲药的作用至关重要，但曲药分析检测手段的不完善一直是制约传统白酒生产进一步发展的一个重要原因。我厂在研究中发现，新兴的代谢指纹技术不仅可以对曲药性质进行准确的刻画，而且可以具体分析出某种制曲因素（如制曲环境、制曲工艺、制曲原料等）对某类微生物群系在曲药中消长的影响。故代谢指纹技术不失为一种应用于更多的了解曲药性质，进行曲药检测、曲药研究、工艺控制及改革等的一种新的有效手段。     

迎接e时代的品质挑战

本文先介绍e时代来临与特质,e时代对品质的新需求，e时代的品质展开，e时代的学习曲线，以及如何应对e时代的品质挑战。     

Electrochemical properties of PtPdRh alloy catalysts for ammonia electrocatalytic oxidation

The study of the electrochemical oxidation (ECO) of ammonia (NH₃) is becoming increasingly an important issue in environmental electrochemistry. For this investigation of platinum-containing electrode material was synthesized by coprecipitating H₂PtCl₆, Pd(NO₃)₃ and Rh(NO₃)₃ and employed as a typical electrocatalytic reaction such as NH₃-ECO for fuel cell application. In this study, ECO ability immersed in a 0.5 M H₂SO₄ solution, where the electrolyte was measured using an electrochemical cyclic voltammetry (CV) technique. Furthermore, the electrocatalytic materials were analyzed by UV–Vis absorption spectra, excitation–emission fluorescent matrix (EEFM) spectroscopy, and zeta potential. Preliminary experimental results showed that the activity of the PtPdRh alloy catalysts using a high potential scan rate; the maximum current density reached for the NH₃-ECO in the voltage range of 0.2 V. Additionally, EEFM was applied to evaluate the freshly prepared catalyst yields for the fluorescent peak at 300/400 nm is associated with the Pt clusters, and UV–Vis absorption spectra revealed that the platinum (IV) species were observed at about 350 nm.     

无铅无乙基硫脲氯醚橡胶硫化体系的开发

由于健康和环境方面的原因,在欧洲,氯醚橡胶是不允许使用含铅和乙基硫脲的硫化体系的。因此,研发无铅无乙基硫脲的硫化体系迫在眉睫。通过使用特殊的商业化的材料,可使氯醚混炼胶的物理机械性能、耐热老化性、耐燃油性能、贮存稳定性及成本均达到或超过含铅硫化体系的氯醚混炼胶。新研发的无铅无乙基硫脲硫化体系氯醚胶的贮存期至少可以达到7周。同时,这些无铅无乙基硫脲硫化体系氯醚胶的材料成本与含铅硫化体系的相当。     

硫化剂TCY对CO/ECO共混物性能的影响

研究了硫化剂TCY对均聚型氯醚橡胶(CO)供聚型氯醚橡胶(ECO)共混物性能的影响。随着硫化剂TCY用量的增大，CO/ECO共混物的t10,t90、最大转矩以及邵尔A型硬度增大，扯断伸长率和撕裂强度减小；硫化剂TCY用量为0．8份时，CO/ECO共混物的综合物理性能较好；适当增大硫化剂TCY用量，可提高CO/ECO共混物的耐热老化性能和压缩水久变形性能。     

二段硫化的均聚型/共聚型氯醚共混胶的性能

研究了二段硫化对均聚型(CO)／共聚型(ECO)氯醚共混胶的力学性能以及高温压缩永久变形的影响：结果表明，采用NA-22硫化体系硫化的CO／ECO共混胶，在合适的二段硫化条件下，可增加硫化胶的拉伸强度，但降低了其扯断伸长认；而采用TCY硫化的共混胶．二段硫化后，硫化胶的拉伸强度基本不变，扯断伸长率减小，二段硫化能明显减少CO／ECO共混胶的高温压缩永久变形，而且在一定范围内．二段硫化时间的延长有利于减少硫化胶的高温压缩永久变形。     

F2^m上基于ONB的椭圆曲线加密软件的设计与实现

1 引言目前,椭圆曲线密码体制(Elliptic Curve Cryptography,ECC)被认为能比其他公钥体制提供更好的加密强度、更快的执行速度和更小的密钥长度。ECC的安全性基于椭圆曲线离散对数问题的难解性。在实际应用的ECC中,椭圆曲线采用的是基于有限域F_p或F_2~m的椭圆曲线群。F_p中的域元素为整数集合{0,1,2,…,p-1},其中p为素数。域F_2~m中的域元素为m位二进制比特     

促进剂TMTD对CO/ECO并用胶性能的影响

研究促进剂TMTD用量对均聚型氯醚橡胶 (CO) /共聚型氯醚橡胶 (ECO )并用胶硫化特性、物理性能、耐热老化性能和高温压缩永久变形的影响。结果表明 ,在CO/ECO并用胶中加入促进剂TMTD ,胶料的t1 0 延长 ,t90 缩短 ,硫化胶的耐热老化性能下降 ;硫化胶的物理性能在促进剂TMTD用量为 1份时较好 ;在合适的二次硫化条件 (160℃× 2h)下 ,添加适量的促进剂TMTD ,可以减小并用胶的高温压缩永久变形。